Acid Storm

An anomaly among early Brazilian thrash bands,
Acid Storm opted for a clean, jumpy, technical brand of thrash, rather
than the raw, deathy form played by their more well-known compatriots
such as
Vulcano,
Sarcofago,
and of course
Sepultura.
As late as 1997 these guys were still recording demos, with a altered
lineup centering on the guitarists, but they presumably gave it up
some time after that.